# GDI Inspect vs Watch Sensor Logger

The clearest difference is ads: GDI Inspect at none against Watch Sensor Logger's shown. GDI Inspect also leads on update cadence (every 5 months vs every 25 months) and iOS requirement (15.6 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GDI Inspect ships an update every 5 months, Watch Sensor Logger every 25 months. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | GDI Inspect | Watch Sensor Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/watch-sensor-logger/id1634449655/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 months** | Every 25 months |
| Monetization | — | Free |
| Size | 37 MB | 17 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Otuvy, Inc.](https://appshunter.io/developer/503956708) | [yuya kanbetsunawa](https://appshunter.io/developer/1597026161) |

## What reviewers say

### GDI Inspect

[App page](https://appshunter.io/ios/app/gdi-inspect/id1051413125)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Watch Sensor Logger

[App page](https://appshunter.io/ios/app/watch-sensor-logger/id1634449655)

Log detailed motion and GPS data from your Apple Watch. Export sensor readings like acceleration, attitude, and location as a CSV file for analysis. This app is exclusively designed for Apple Watch.

**Highlights:** Log sensor data, GPS tracking, Export to CSV, Acceleration logging, Attitude data, Time stamping

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GDI Inspect free?

GDI Inspect is free to download, with no in-app purchases.

### Is Watch Sensor Logger free?

Watch Sensor Logger is free to download, with no in-app purchases.

### Do GDI Inspect or Watch Sensor Logger have ads?

Watch Sensor Logger shows ads; GDI Inspect does not.

### Which is updated more often, GDI Inspect or Watch Sensor Logger?

GDI Inspect ships an update every 5 months, and Watch Sensor Logger every 25 months. Most recently, GDI Inspect was updated on October 26, 2026 and Watch Sensor Logger on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*